Toyota 1RZ Supplement Manual page 246

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DI- -154
5 Check voltage between terminals IGT1 and IGT2 of engine ECU connector and
body ground.
START
IGT1
(- -) (+)
BE6653
A01848
IGT1/IGF signal waveform
IGT1
IGF
10m sec./Division (Idling)
P19902
OK
6 Disconnect ignition coil (w/ igniter) connector and check voltage between termi-
nals IGT1 and IGT2 of engine ECU connector and body ground.
START
IGT1
(- -) (+)
BE6653
A01848
OK
DIAGNOSTICS
PREPARATION:
Remove the grove compartment.
CHECK:
Measure voltage between terminals IGT1 and IGT2 of engine
ECU connector and body ground when engine is cranked.
OK:
IGT2
A02268
Reference: INSPECTION USING OSCILLOSCOPE
During idling, check waveform between terminals IGT1 and E1
2V/Division
of engine ECU.
HINT:
The correct waveform are as shown.
IGT2 signal waveform is same as the IGT1 signal waveform.
A00297
PREPARATION:
(a)
(b)
CHECK:
Measure voltage between terminals IGT1 and IGT2 of engine
ECU connector and body ground when engine is cranked.
OK:
IGT2
A02268
- - ENGINE (2RZ- -FE, 3RZ- -FE)
Voltage: More than 0.1 V and less than 4.5 V
NG Check and replace engine ECU
(See page IN- -21).
Disconnect the ignition coil (w/ igniter) connector.
Remove the glove compartment.
Voltage: More than 0.1 V and less than 4.5 V
NG Check and replace engine ECU
(See page IN- -21).
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